Puerto Rico bankruptcy may be imminent, potentially a 'seminal event'; Israel releases tax revenue collections to Palestinian Authority; Mideast nations line up for and against Saudi airstrikes in Yemen; Mideast countries opposed to Saudi intervention in Yemen

Saudi Arabia, with US help, leads Arab nations to strike Houthis in Yemen; Iran threatens retaliation against Saudi Arabia for Yemen strikes; Shia militias sidelined for Iraq's assault on Tikrit, with US help